Migrate test block 113 to Dart 2.0.

tests/language_strong/generic_inheritance_test.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-//
-// Test verifying that the type argument vector of subclasses are properly
-// initialized by the class finalizer.
-
-import "package:expect/expect.dart";
-
-class A<T> {
-  A();
-}
-
-class B extends A<Object> {
-  B();
-}
-
-class C extends B {
-  C();
-}
-
-main() {
-  var a = new A<String>();
-  var b = new B();
-  var c = new C();
-  Expect.isTrue(a is Object);
-  Expect.isTrue(a is A<Object>);
-  Expect.isTrue(a is A<String>);
-  Expect.isTrue(a is! A<int>);
-  Expect.isTrue(b is Object);
-  Expect.isTrue(b is A<Object>);
-  Expect.isTrue(b is! A<String>);
-  Expect.isTrue(b is Object);
-  Expect.isTrue(c is Object);
-  Expect.isTrue(c is A<Object>);
-  Expect.isTrue(c is! A<String>);
-  Expect.isTrue(c is B);
-}